Question

Моторная лодка проходит 0,65 км в первую минуту, 1,2 км в следующие 2 минуты и последний 550 м пройдено за 1 минуту. если он ровно ехал во всех трех случаях , то найдите его среднюю скорость на всем пути (км / ч).

Answer 1

Ответ:

Его средняя скорость =36км/ч

Answer 2

Calculation of Average Speed

To calculate the average speed of the motorboat, we need to find the total distance traveled and the total time taken.

Let's break down the given information:

- The motorboat travels 0.65 km in the first minute. - The motorboat travels 1.2 km in the next 2 minutes. - The motorboat travels 550 m in the last minute.

To find the total distance traveled, we add up the distances covered in each time interval:

Total distance = 0.65 km + 1.2 km + 550 m

To calculate the total time taken, we add up the time intervals:

Total time = 1 minute + 2 minutes + 1 minute

Now, we can calculate the average speed using the formula:

Average speed = Total distance / Total time

Let's calculate the average speed step by step:

Total distance = 0.65 km + 1.2 km + 550 m = 0.65 km + 1.2 km + 0.55 km = 2.4 km

Total time = 1 minute + 2 minutes + 1 minute = 4 minutes

Average speed = 2.4 km / 4 minutes

To convert the average speed from minutes to hours, we need to multiply it by 60:

Average speed = (2.4 km / 4 minutes) * 60 minutes/hour

Now, let's calculate the average speed:

Average speed = (2.4 km / 4 minutes) * 60 minutes/hour = 1.44 km/h

Therefore, the average speed of the motorboat over the entire distance is 1.44 km/h.